What you were expecting to happen, and what actually happened? I got a notification that my defense team won. Three times, actually! I didn't think my team was all that menacing, so I went to look at who could possibly have lost to my cupcake squad. It was the same person all three times. I checked their PVP stats to see if they're a new player, and it turns out that they have had no invade losses this week. This seems improbable, given my battle log.
What are the steps to make it happen again…

I just find it a little strange to see the same person invading me so rapidly, and I have like the worst defense team there is, I should not have won in first place. So most probably a bug?

Macawi:

@Eika, there is another thread where this has been happening to others.

I posted in the other thread that I had the same thing happen to me when I switched to a joke defence team. When I saw 2 level 1000+ players seemingly unable to beat it, and me getting only 1 point each time they lost, I knew something was wrong. As Macawi says, no updates from a dev on this. In my case, it seemed to have something to do with at least one of the other players doing casual PVP and yet somehow still interacting with my battle log (although they never actually battled me).

It really undermines my confidence in my defence stats, but is otherwise inconsequential.

I am 99% sure what is happening is casual invades appear on defenders as wins for 1 point. Easy 1 trophy, meh gold, but you probably have 1 troop defence, meaning it's super fast. Also, only 50 gold to refresh for a new opponent.

The devs have not responded about this "feature".

But it's Technically legit ^^ Also had other people invade multiple times in a row.

Intrim and Intrim II were just looking at this very issue because we kept seeing the +1 also from random opponents, and often repeatedly. We think it may be related to casual PVP. When Player A beats Player B in casual PVP, Player B often (always?) gets a 1-point ranked defense win. We would love to see if others can corroborate this too, so that it can be nailed down and fixed if it's not intended.

If you're associated with Intrim II, we can test this. I currently have tojop on my list of possible casual opponents. If you tell me when they're typically active, I will try to do a casual invade during that time period.

This doesn't resolve the issue of multiple such "victories" in less than one minute, though.